<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面未找到</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: #f8f9fa;
            height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 20px;
        }

        .container {
            max-width: 600px;
        }

        .error-code {
            font-size: 8rem;
            font-weight: bold;
            color: #2c3e50;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
            animation: float 3s ease-in-out infinite;
        }

        .error-message {
            font-size: 1.5rem;
            color: #6c757d;
            margin: 20px 0;
        }

        .home-btn {
            display: inline-block;
            padding: 12px 30px;
            background: #3498db;
            color: white;
            text-decoration: none;
            border-radius: 25px;
            transition: all 0.3s ease;
            margin-top: 20px;
        }

        .home-btn:hover {
            background: #2980b9;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }

        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-20px); }
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .error-code {
                font-size: 5rem;
            }
            
            .error-message {
                font-size: 1.2rem;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="error-code">404</div>
        <h1 class="error-message">哎呀，页面不存在！</h1>
        <p>您访问的页面可能已被移动、删除或暂时不可用</p>
        <a href="/" class="home-btn">返回首页</a>
    </div>
</body>
</html>